1&1 DSL VoIP

Has one of you successfully running 1&1 VoIP via 3CX in Germany? If so could you attach a screenshot of the "Options", "Inbound Parameters" and "Outbound Parameters" tabs?
That would be great! This would save me from doing trial and error at one of my customers.

3CX wrote a few manuals for 1&1 and added them as official PBX Express provider but looks like someone forgot to set up 1&1 in the list of SIP trunks.